Follow the default numbers.
With monthly rent of $2,400, the model gives new monthly rent: $2,520.
The formula is new rent = current rent × (1 + increase). Open the breakdown to trace expenses and assumptions. Change one input at a time to see how your decision changes. This example uses scenario inputs; it is not an offer, tax bill, appraisal or legal determination.
Percent, dollars and the new rent
The same change can be expressed three ways. Divide the dollar increase by the old monthly rent to find the percentage. Multiply the old rent by the percentage to find the dollar increase. Subtract old rent from proposed rent when you already know the new price. The multi-year table compounds the calculated percentage annually. It is a projection, not permission to repeat an increase.
Coverage comes before the cap
Select the state and any listed local system, then confirm whether the property is covered. California’s statewide AB 1482 limit is the smaller of ten percent and five percent plus the applicable regional CPI. Oregon and Washington publish annual percentages. Local rent control can be stricter. Exemptions depend on property age, ownership, notices, subsidy programs and other facts that the calculator cannot determine.
Dates change the applicable rule
A rent cap belongs to an effective period. The calculator refuses to present an annual percentage as current outside its recorded period. New York City apartment guidelines depend on the renewal start date and lease length; they are not a statewide rate. Notice requirements are also separate from the allowed percentage. Prior increases during the same twelve-month period can reduce the remaining headroom.
Check the actual notice
The displayed notice interval is a planning reminder, not a completed legal notice. Service method, weekends, renewal deadlines and tenant protections can affect the earliest lawful effective date. Confirm the current statute or rent-board order linked below before serving a notice. When the source does not establish a numeric cap, the result reports that the rule needs checking rather than treating the absence of a preset as unlimited permission.
Keep your assumptions with the result
Save the calculation to your deal file to reuse compatible inputs in another tool. The file stays in this browser on this device. Download the CSV to open the complete inputs, results and schedule in Excel or Google Sheets. Use PDF to print the report or save it as a PDF. A share link includes entered financial figures in its URL, so use it only with people you intend to share those numbers with.